package com.heimali.sf.fragments;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Display;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.GridView;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.ViewFlipper;

import com.heimali.sf.R;
import com.heimali.sf.calendar.AddNoteActivity;
import com.heimali.sf.calendar.NoteDetailActivity;
import com.heimali.sf.db.NoteHelper;
import com.heimali.sf.fragments.CalendarFragment.NoteAdapter.NoteItemHolder;
import com.heimali.sf.models.CalendarGridView;
import com.heimali.sf.models.CalendarGridViewAdapter;
import com.heimali.sf.models.Note;
import com.heimali.sf.utils.NumberUtils;
import com.heimali.sf.utils.SystemUtils;

public class CalendarFragment extends BaseFragment implements OnTouchListener, OnClickListener, OnItemClickListener, OnItemLongClickListener {

	// 判断手势用
	private static final int SWIPE_MIN_DISTANCE = 120;
	private static final int SWIPE_MAX_OFF_PATH = 250;
	private static final int SWIPE_THRESHOLD_VELOCITY = 200;

	private Animation slideTopIn;
	private Animation slideTopOut;
	private Animation slideBottomIn;
	private Animation slideBottomOut;
	
	private ViewFlipper viewFlipper;
	GestureDetector mGesture = null;

	// 基本变量
	private Context mContext;
	private GridView title_gView;
	private GridView gView1;// 上一个月
	private GridView gView2;// 当前月
	private GridView gView3;// 下一个月

	boolean bIsSelection = false;// 是否是选择事件发生
	private Calendar calStartDate = Calendar.getInstance();// 当前显示的日历
	private Calendar calSelected = Calendar.getInstance(); // 选择的日历
	private Calendar calToday = Calendar.getInstance(); // 今日
	private CalendarGridViewAdapter gAdapter;
	private CalendarGridViewAdapter gAdapter1;
	private CalendarGridViewAdapter gAdapter3;
	// 顶部按钮
	private Button btnToday = null;
	private RelativeLayout mainLayout;

	//
	private int iMonthViewCurrentMonth = 0; // 当前视图月
	private int iMonthViewCurrentYear = 0; // 当前视图年
	private int iFirstDayOfWeek = Calendar.MONDAY;

	private static final int titleLayoutID = 77; // title布局ID
	private static final int caltitleLayoutID = 66; // title布局ID
	private static final int calLayoutID = 55; // 日历布局ID
	
	/** 底部菜单文字 **/
	String[] menu_toolbar_name_array;
	
	private ListView noteListView;
	private NoteAdapter noteAdapter;

	@Override
	public boolean onTouch(View v, MotionEvent event) {
		return mGesture.onTouchEvent(event);
	}

	AnimationListener animationListener = new AnimationListener() {
		@Override
		public void onAnimationStart(Animation animation) {
		}

		@Override
		public void onAnimationRepeat(Animation animation) {
		}

		@Override
		public void onAnimationEnd(Animation animation) {
			// 当动画完成后调用
			CreateGirdView();
		}
	};

	class GestureListener extends SimpleOnGestureListener {
		@Override
		public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
			try {
				if (Math.abs(e1.getX() - e2.getX()) > SWIPE_MAX_OFF_PATH) {
					return false;
				}
				
				if (e1.getY() - e2.getY() > SWIPE_MIN_DISTANCE && Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
					nextMonth();
					return true;
				} else if (e2.getY() - e1.getY() > SWIPE_MIN_DISTANCE && Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
					preMonth();
					return true;
				}
				
			} catch (Exception e) {
				// nothing
			}
			return false;
		}

		@Override
		public boolean onSingleTapUp(MotionEvent e) {
			// 得到当前选中的是第几个单元格
			int pos = gView2.pointToPosition((int) e.getX(), (int) e.getY());
			LinearLayout txtDay = (LinearLayout) gView2.findViewById(pos + 5000);
			if (txtDay != null) {
				if (txtDay.getTag() != null) {
					Date date = (Date) txtDay.getTag();
					calSelected.setTime(date);
					
					gAdapter.setSelectedDate(calSelected);
					gAdapter.notifyDataSetChanged();

					gAdapter1.setSelectedDate(calSelected);
					gAdapter1.notifyDataSetChanged();

					gAdapter3.setSelectedDate(calSelected);
					gAdapter3.notifyDataSetChanged();
					
					refreshNoteList(SystemUtils.getCurrentDate(date));
				}
			}
			return false;
		}
	}

	public void nextMonth() {
		viewFlipper.setInAnimation(slideTopIn);
		viewFlipper.setOutAnimation(slideTopOut);
		viewFlipper.showNext();
		setNextViewItem();
	}

	public void preMonth() {
		viewFlipper.setInAnimation(slideBottomIn);
		viewFlipper.setOutAnimation(slideBottomOut);
		viewFlipper.showPrevious();
		setPrevViewItem();
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		mContext = activity;
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		
		View v = inflater.inflate(R.layout.fragment_calendar, null);
		
		mainLayout = (RelativeLayout) v.findViewById(R.id.main_layout);
		btnToday = (Button) v.findViewById(R.id.today_btn);
		
		Button addNoteBtn = (Button) v.findViewById(R.id.add_note_btn);
		addNoteBtn.setOnClickListener(this);
		
		// 创建一个垂直的线性布局（整体内容）
		viewFlipper = new ViewFlipper(activity);
		viewFlipper.setId(calLayoutID);
		calStartDate = getCalendarStartDate();
		setTitleGirdView();
		RelativeLayout.LayoutParams params_cal_title = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT,
				LayoutParams.WRAP_CONTENT);
		params_cal_title.addRule(RelativeLayout.BELOW, titleLayoutID);
		mainLayout.addView(title_gView, params_cal_title);

		CreateGirdView();

		RelativeLayout.LayoutParams params_cal = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT,
				LayoutParams.WRAP_CONTENT);
		params_cal.addRule(RelativeLayout.BELOW, caltitleLayoutID);
		mainLayout.addView(viewFlipper, params_cal);

		
		UpdateStartDateForMonth();

		
		slideTopIn = AnimationUtils.loadAnimation(activity, R.anim.slide_top_in);
		slideTopOut = AnimationUtils.loadAnimation(activity, R.anim.slide_top_out);
		slideBottomIn = AnimationUtils.loadAnimation(activity, R.anim.slide_bottom_in);
		slideBottomOut = AnimationUtils.loadAnimation(activity, R.anim.slide_bottom_out);
		
		slideTopIn.setAnimationListener(animationListener);
		slideTopOut.setAnimationListener(animationListener);
		slideBottomIn.setAnimationListener(animationListener);
		slideBottomOut.setAnimationListener(animationListener);

		mGesture = new GestureDetector(activity, new GestureListener());
		
		noteAdapter = new NoteAdapter(activity);
		noteListView = (ListView) v.findViewById(R.id.note_list);
		noteListView.setAdapter(noteAdapter);
		noteListView.setEmptyView(v.findViewById(R.id.empty_tip));
		noteListView.setOnItemClickListener(this);
		noteListView.setOnItemLongClickListener(this);
		
		return v;
	}
	
	@Override
	public void onResume() {
		super.onResume();
		refreshUI();
	}

	AlertDialog.OnKeyListener onKeyListener = new AlertDialog.OnKeyListener() {
		@Override
		public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
			if (keyCode == KeyEvent.KEYCODE_BACK) {
				activity.finish();
			}
			return false;
		}
	};

	public void refreshUI() {
		refreshNoteList(SystemUtils.getCurrentDate(calSelected.getTime()));
	}
	
	public void refreshNoteList(String date) {
		List<Note> list = NoteHelper.getInstance().getList(date);
		noteAdapter.setDataSource(list);
		noteAdapter.notifyDataSetChanged();
	}


	private void setTitleGirdView() {
		title_gView = setGirdView();
		LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,
				LayoutParams.WRAP_CONTENT);
		title_gView.setLayoutParams(params);
		title_gView.setVerticalSpacing(0);// 垂直间隔
		title_gView.setHorizontalSpacing(0);// 水平间隔
		TitleGridAdapter titleAdapter = new TitleGridAdapter(activity);
		title_gView.setAdapter(titleAdapter);// 设置菜单Adapter
		title_gView.setId(caltitleLayoutID);
	}

	private void CreateGirdView() {

		Calendar tempSelected1 = Calendar.getInstance(); // 临时
		Calendar tempSelected2 = Calendar.getInstance(); // 临时
		Calendar tempSelected3 = Calendar.getInstance(); // 临时
		tempSelected1.setTime(calStartDate.getTime());
		tempSelected2.setTime(calStartDate.getTime());
		tempSelected3.setTime(calStartDate.getTime());

		gView1 = new CalendarGridView(mContext);
		tempSelected1.add(Calendar.MONTH, -1);
		gAdapter1 = new CalendarGridViewAdapter(activity, tempSelected1);
		gView1.setAdapter(gAdapter1);// 设置菜单Adapter
		gView1.setId(calLayoutID);

		gView2 = new CalendarGridView(mContext);
		gAdapter = new CalendarGridViewAdapter(activity, tempSelected2);
		gView2.setAdapter(gAdapter);// 设置菜单Adapter
		gView2.setId(calLayoutID);

		gView3 = new CalendarGridView(mContext);
		tempSelected3.add(Calendar.MONTH, 1);
		gAdapter3 = new CalendarGridViewAdapter(activity, tempSelected3);
		gView3.setAdapter(gAdapter3);// 设置菜单Adapter
		gView3.setId(calLayoutID);

		gView2.setOnTouchListener(this);
		gView1.setOnTouchListener(this);
		gView3.setOnTouchListener(this);

		if (viewFlipper.getChildCount() != 0) {
			viewFlipper.removeAllViews();
		}

		viewFlipper.addView(gView2);
		viewFlipper.addView(gView3);
		viewFlipper.addView(gView1);

		String s = calStartDate.get(Calendar.YEAR) + "-"
				+ NumberUtils.LeftPad_Tow_Zero(calStartDate.get(Calendar.MONTH) + 1);

		btnToday.setText(s);
	}

	private GridView setGirdView() {
		LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,
				LayoutParams.WRAP_CONTENT);
		GridView gridView = new GridView(activity);
		gridView.setLayoutParams(params);
		gridView.setNumColumns(7);// 设置每行列数
		gridView.setGravity(Gravity.CENTER_VERTICAL);// 位置居中
		gridView.setVerticalSpacing(1);// 垂直间隔
		gridView.setHorizontalSpacing(1);// 水平间隔
		gridView.setBackgroundColor(getResources().getColor(R.color.calendar_background));

		WindowManager windowManager = activity.getWindowManager();
		Display display = windowManager.getDefaultDisplay();
		int i = display.getWidth() / 7;
		int j = display.getWidth() - (i * 7);
		int x = j / 2;
		gridView.setPadding(x, 0, 0, 0);// 居中

		return gridView;
	}

	// 上一个月
	private void setPrevViewItem() {
		iMonthViewCurrentMonth--;// 当前选择月--
		// 如果当前月为负数的话显示上一年
		if (iMonthViewCurrentMonth == -1) {
			iMonthViewCurrentMonth = 11;
			iMonthViewCurrentYear--;
		}
		calStartDate.set(Calendar.DAY_OF_MONTH, 1); // 设置日为当月1日
		calStartDate.set(Calendar.MONTH, iMonthViewCurrentMonth); // 设置月
		calStartDate.set(Calendar.YEAR, iMonthViewCurrentYear); // 设置年

	}

	// 下一个月
	private void setNextViewItem() {
		iMonthViewCurrentMonth++;
		if (iMonthViewCurrentMonth == 12) {
			iMonthViewCurrentMonth = 0;
			iMonthViewCurrentYear++;
		}
		calStartDate.set(Calendar.DAY_OF_MONTH, 1);
		calStartDate.set(Calendar.MONTH, iMonthViewCurrentMonth);
		calStartDate.set(Calendar.YEAR, iMonthViewCurrentYear);

	}

	// 根据改变的日期更新日历
	// 填充日历控件用
	private void UpdateStartDateForMonth() {
		calStartDate.set(Calendar.DATE, 1); // 设置成当月第一天
		iMonthViewCurrentMonth = calStartDate.get(Calendar.MONTH);// 得到当前日历显示的月
		iMonthViewCurrentYear = calStartDate.get(Calendar.YEAR);// 得到当前日历显示的年

		String s = calStartDate.get(Calendar.YEAR) + "-"
				+ NumberUtils.LeftPad_Tow_Zero(calStartDate.get(Calendar.MONTH) + 1);
		btnToday.setText(s);

		// 星期一是2 星期天是1 填充剩余天数
		int iDay = 0;
		int iFirstDayOfWeek = Calendar.MONDAY;
		int iStartDay = iFirstDayOfWeek;
		if (iStartDay == Calendar.MONDAY) {
			iDay = calStartDate.get(Calendar.DAY_OF_WEEK) - Calendar.MONDAY;
			if (iDay < 0)
				iDay = 6;
		}
		if (iStartDay == Calendar.SUNDAY) {
			iDay = calStartDate.get(Calendar.DAY_OF_WEEK) - Calendar.SUNDAY;
			if (iDay < 0)
				iDay = 6;
		}
		calStartDate.add(Calendar.DAY_OF_WEEK, -iDay);

	}

	private Calendar getCalendarStartDate() {
		calToday.setTimeInMillis(System.currentTimeMillis());
		calToday.setFirstDayOfWeek(iFirstDayOfWeek);

		if (calSelected.getTimeInMillis() == 0) {
			calStartDate.setTimeInMillis(System.currentTimeMillis());
			calStartDate.setFirstDayOfWeek(iFirstDayOfWeek);
		} else {
			calStartDate.setTimeInMillis(calSelected.getTimeInMillis());
			calStartDate.setFirstDayOfWeek(iFirstDayOfWeek);
		}

		return calStartDate;
	}

	public class TitleGridAdapter extends BaseAdapter {

		int[] titles = new int[] { R.string.Sun, R.string.Mon, R.string.Tue, R.string.Wed, R.string.Thu, R.string.Fri,
				R.string.Sat };

		private Activity activity;

		// construct
		public TitleGridAdapter(Activity a) {
			activity = a;
		}

		@Override
		public int getCount() {
			return titles.length;
		}

		@Override
		public Object getItem(int position) {
			return titles[position];
		}

		@Override
		public long getItemId(int position) {
			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			LinearLayout iv = new LinearLayout(activity);
			TextView txtDay = new TextView(activity);
			txtDay.setFocusable(false);
			txtDay.setBackgroundColor(Color.TRANSPARENT);
			iv.setOrientation(1);

			txtDay.setGravity(Gravity.CENTER);
			LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,
					LayoutParams.FILL_PARENT);

			int i = (Integer) getItem(position);

			txtDay.setTextColor(Color.WHITE);
			Resources res = getResources();

			if (i == R.string.Sat) {
				// 周六
				txtDay.setBackgroundColor(res.getColor(R.color.title_text_6));
			} else if (i == R.string.Sun) {
				// 周日
				txtDay.setBackgroundColor(res.getColor(R.color.title_text_7));
			} else {

			}

			txtDay.setText((Integer) getItem(position));

			iv.addView(txtDay, lp);

			return iv;
		}
	}

	@Override
	public void onClick(View v) {
		switch(v.getId()) {
		case R.id.add_note_btn:
			startActivity(new Intent(activity, AddNoteActivity.class));
			break;
		}
	}
	
	class NoteAdapter extends BaseAdapter {

		private List<Note> noteList = new ArrayList<Note>();
		private LayoutInflater inflater;
		
		public NoteAdapter(Context context) {
			this.inflater = LayoutInflater.from(context);
		}
		
		public void setDataSource(List<Note> list) {
			if (list == null) {
				return ;
			}
			
			noteList.clear();
			noteList.addAll(list);
		}
		
		public List<Note> getDataSource() {
			return noteList;
		}
		
		@Override
		public int getCount() {
			if (noteList == null) {
				return 0;
			}
			
			return noteList.size();
		}

		@Override
		public Object getItem(int position) {
			if (noteList == null) {
				return null;
			}
			
			return noteList.get(position);
		}

		@Override
		public long getItemId(int position) {
			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			NoteItemHolder holder = null;
			if (convertView == null) {
				holder = new NoteItemHolder();
				convertView = inflater.inflate(R.layout.note_item, null);
				holder.time = (TextView) convertView.findViewById(R.id.note_item_time);
				holder.name = (TextView) convertView.findViewById(R.id.note_item_name);
				convertView.setTag(holder);
			}else {
				holder = (NoteItemHolder)convertView.getTag();
			}
			
			Note item = (Note)getItem(position);
			holder.time.setText(item.time);
			holder.name.setText(item.name);
			holder.id = item.id;
			
			return convertView;
		}
		
		public class NoteItemHolder {
			public TextView time;
			public TextView name;
			public int id;
		}
		
	}

	@Override
	public void onItemClick(AdapterView<?> parentView, View v, int position, long arg3) {
		NoteItemHolder holder = (NoteItemHolder)v.getTag();
		if (holder == null) {
			return ;
		}
		
		Intent intent = new Intent(activity, NoteDetailActivity.class);
		intent.putExtra(NoteDetailActivity.INTENT_NOTE_ID, holder.id);
		startActivity(intent);
	}

	@Override
	public boolean onItemLongClick(AdapterView<?> parentView, View v, int position, long arg3) {
		return false;
	}
}
